What Is the Best Description of a Least-Squares Regression Line

What is the best description of a least-squares regression line?

A) The line that makes the square of the correlation in the data as large as possible
B) The line that makes the sum of the squares of the vertical distances of the data points from the line as small as possible
C) The line that best splits the data in half, with half of the points above the line and half below the line
D) The line that passes through as many of the observed data points as possible